4. Daryl is trying to move on from his past
Early in the episode we learned that Carol had fled to a shelter with Sophia at some point in their past, trying to escape abuse. When the two are looking for a place to stay in the temporary housing, we briefly see a copy of 'Treating Survivors of Childhood Abuse' lying on a table. Later in the episode the book falls out of Daryl's bag when Carol picks it up.
This is probably the first moment we've seen Daryl really try to make a move past his childhood. We know that as a kid, Daryl and Merle's mother died and later Merle left him to be raised by their abusive father. His childhood has obviously profoundly affected his entire life, though now it looks like he's trying to start healing the wounds of his past.